The ciliary muscles behind the iris shape the lens by pulling the choroid up and relaxing the suspensory ligaments. The ciliary muscle changes the shape of the lens within the eye, not the size of the pupil which is carried out by the spincter pipillae muscle and dilator pupillae. When the ciliary muscle is relaxed, the choroid acts like a spring pulling on the lens via the zonule fibers causing the lens to flatten, and when the muscle contracts, it stretches the choroid, releasing the tension on the lens and thus they become thicker.
Answer:
D. It is able to form colonies and produce oxygen.
Explanation:
Cyanobacteria are the photoautotrophs and carry out oxygenic photosynthesis. These prokaryotic organisms use water molecules as an electron donor during light-dependent reactions of photosynthesis and release oxygen gas as a by-product.
Cyanobacteria are considered to be the first organisms on the earth to perform oxygenic photosynthesis and are supposed to be responsible for the present-day oxidative atmosphere of the earth. Most of the cyanobacteria are colonial forms and are present as colonies of a large number of cells. However, unicellular solitary forms are also present.
The energy of the sun of course :3
<span>(2) soon become extinct, because they have little genetic diversity. Since they have reduced from a 100 to a 10, it shows they have not adapted well over time and so they might go extinct and since there are not many of them left, there is little genetic diversity so they might go extinct.
</span>